Liquid-fuel burner



A. C. KREITZER.

LIQUID FUEL BURNER.

APPLICATION FILED APR. 14. 1920.

Patented June 28,1921.

v INVQZNTOR. J1 61H mlijer ATTORNEYJ'.

. eter of the pipe 10 being less than that of UNITED STATES PATENTOFFICE.

AUGUST 0. KREITZER, OF HUMBOLDT, KANSAS.

LIQUID-FUEL BURN ER.

Specification of Letters Patent. Patented June 28, 1921.

Application filed April 14, 1920. Serial No. 373,862. v

T 0 all whom it may concern:

Be it known that 1, AUGUST C. KRErrznR, a citizen of the United States,residing at Humboldt, in the county of Allen and State of Kansas, haveinvented new and useful Improvements in Liquid-Fuel Burners, of

and dirty crude .oil without clogging up,

and which produces a large flame of intense heat.

The invention also has for its object t.o provide a burner of the kindstated which can be easily cleaned without removal from the furnace, andwhich is economical in fuel consumption, and readily regulated.

The objects stated areattained by means of a combination and arrangementof parts to be hereinafter described and claimed, and in order that thesame may be better understood, reference is had to the accompanymgdrawing forming a part of this specification.

In the drawing,

Figure 1 is an elevation of the burner,

Fig. 2 is a central longitudinal section thereof, partly broken away,and

Fig. 3 is a plan view of a burner tip.

Referring specifically to the drawing 5 denotes the casing of theburner, the same being a tube of suitable length having fitted to itsforward'end a discharge nozzle, and provided at its rear end with a fueland steam connection. This connection is made bv fitting the rear end ofthe tube with a T-coupling 6 into one end of which the tube is screwed,with a plug 7 seating 1n the opposite end of the coupling. To the sideof the coupling member is attacheda steam delivery pipe 8, and to theplug 7 is connected a fuel delivery pipe 9.

Mounted centrally within the tube 5 1s a pipe 10 which carries the fuelto the nozzle of the burner, the forward end of the plpe discharginginto the nozzle, and its rear end being connected to the pipe 9 where 1tscrews into the plug 7. Oil or other liquid fuel flows through the pipe10 to the nozzle, and steam entering the coupling member 6 flows throughthe tube 5 to the' nozzle, the diamthe tube 5, so that it is spaced fromthe latter. The hot steam surrounding the fuel pipe 10 heats said pipeand the fuel flow- 1ng therethrough so that it flows freely and is alsopartly vaporized.

The nozzle comprises a tubular main body 11 to the rear end of which issecured a cap 12 tapered toward its rear end and having said endextending into the forward end of the tube 5 for a short distance. Thecap 12 is screwed into the nozzle body 11 and it is fastened to the tube5 b a coupling nut 13.

To the rear .end of the cap 12, where it seats in the tube 5, in spacedrelation therewith, is connected the fuel pipe 10, so that the fuel isdischarged through the cap into,

the nozzle body 11. In the side of the cap 12 are ports 14 establishingcommunicationbetween the inside of the cap and the steam space in thetube 5 around the pipe10. It will therefore be seen that steam as-aliquid fuel are discharged into the cap 12, from which latter the samepass into the nozzle body 11, the latter forming a mixing chamber inwhich the steam and fuel thoroughly commingle. The wall of the cap 12 inwhich the'ports 14 are located is flared forwardly, and said ports arearranged obliquely with respect to the longitudinal axis of the cap 12,which results in a discharge of steam jets obliquely across the streamof fuel entering the cap from the pipe 10. This results in the fuelbeing caught and whirled around by the jets of steam, so that in itspassage through the nozzle body or mixing chamber 11 it is transformedpractically into a gas.

To the forward end of the nozzle body 11 is secured a nipple 15 having areduced outer end to'which a burner tip 16 is secured.

Immediately back of the nipple 15, and opening thereinto, the nozzlebody 11 seats a conicaldeflector member 17 having a central port 18 andside ports 19. This member is hollow and its apex points rearwardly,with the port 18 opening into the center of the nozzle body 11. heinteriorof the member 17 is flared forwa dly, and the side ports 19 arelocated to discharge obliquely thereinto.

The mixture of oil and steam transformed into a highly combustible gasin the nozzle tween said-valves, a branch 22 is connected.

nipple 15 to the tip 16 and is discharged from the latter. The gaseousmixture passing through the ports 19 is discharged in an obliquedirection with respect to the stream entering the member 17 by the wayof the center port .18, which produces a further commingling of the fuelparticles. The

pressure is also reduced owing to the flare of the member 17, and thefuel mixture is discharged from the tips 16 in a gentle wide s read, sothat it burns close to the tip.

he flame is white and has an intense heat, and combustion takes placewith practically no smoke. g Thesteam" upply pipe 8-is equipped with twovalvesand 21, respectively, and'be:

to the fuel delivery pipe 9. A fuel.

-' su 1y pipe 23 is connected to the pipe 9 and has a valve 24. "In thebranch 22 is interposed 'a valve 25.

To operate the burner, the valve 25 is closed, and the valves 20, 21and24. are- .opened, whereupon the oil or other liquid fuel enters thepipe 10, and steam enters the tube 5. If the oil is very thick and dirtythe valve 25 is qpened more or less so that some steam is alsoeliveredinto the fuel pipe 10. If the burner needs cleaning, the valve 20 may beclosed and the valve 25 opened, to let the whole pressure go through thepipe 10, and thiscan be done without removing the burner from its placein the furnace.

I claim:

1. In a liquid-fuel burner, a tubular member, a fuel pipe in said memberandspaced from'the interior wall thereof, a steam supconnection to thetubular member a y -1el'com1ection to the fuel pipe, a mixing chamber atthe outlet end of the tubular member and the fuel pipe, allollow memberehaiilber, sai 'portqgg stablishing communication with its mter lishingcommunication between the interior .of the mixing chamber and theinterior of the deflector member, said side ports being across out ofalinement with respect to the firstmentioned side ports, and a nozzletip having a connection with the interior of the deflector member.

2. In a liquid-fuel burner, a tubular member, a fuel pipe in said memberand spaced from the interior wall thereof, a steam supply connection tothe tubular member, a fuel connection to the fuel pi a mixingchamher atthe outlet end of lihe tubular, member and the fuel pipe, a connectionbetween the mixing chamber, the tubular member and the fuel pipe, saidconnection havin steam and fuel port for admitting steam and fuel intothe mixing chamber, the fuel port being positioned to dischargecentrally mto the mlxi'n being' 0 stream of fuel delivered throng thefuel port, a nozzle tip on the outlet'end of the mixing chamber, and ahollow deflector member in the mixing chamber back of the nozzle tip,said deflector member havchamber, and the steam ports positioned todischarge obliquelfi t ing a central port and oblique side portestablishing communication between the interior of the mixing chamberand the interior of the deflector member, said side ports being out ofalinement with respect to the aforesaid steam orts.

3. In a liquiduel burner, a tubular member, a fuel pipe in said memberand spaced from the interior wall thereof, a steam supthe fuel pipe,said connection having steam and fuel ports for admittin' steam and fuelrt beinto the mixing chamber, e fuel ingpositioned to discharge centraly into the mixing-chamber, and the steam ,ports being positioned todischarge obliquel across the stream of fuel delivered throng the fuelport, a nozzle tip on the outlet end of the mixing chamber, and a hollowdeflector member in the mixing chamber back of the zzle tip, saiddeflector member havingfia pentral establishin communication between theinterior of t e mixingchamber and the interior of the deflector member,said side ports being out of alinement with respect to the foresaidsteam ports, and said interior 3f the deflector member having a forwardare.

In testimony whereof I aflix mg signature.

AUGUST 0. KB ITZER.

port and oblique side ports v 90 ply connectionito the tubular member, afuel v y

